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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Measurement System and Campaign for Characterizing the Theoretical Capacity and Cross-Correlation of Multiple-Input Multiple Output Indoor Wireless Channels

Aron, Jason S. 22 April 2002 (has links)
The demands for greater capacity and lower transmitted power have historically motivated research in spatial diversity systems. Diversity techniques have been implemented in many current systems and have been shown to reduce the transmit power required to maintain acceptable system performance. Traditionally spatial diversity is based on the transmission and reception of a single stream of symbols through independent and spatially separated propagation channels. In more recent developments, space-time coding and array processing techniques use diversity concepts to resolve multiple independent streams of data and increase the potential data-rate. This new space-time research investigates the unprecedented ability to simultaneously transmit separate data streams from many closely-spaced antennas on a common carrier frequency. The effectiveness of these multi-element arrays in communication systems has been found to depend on antenna design and specific characteristics of the propagation channels. This thesis describes an effort to characterize an indoor office environment with respect to these applications. Theoretical analyses have demonstrated a relationship between the theoretical capacity of multi-element array systems with the cross-correlation of spatially separated channels. Historical measurements have also shown that in the presence of Rayleigh fading, antenna spacing may be used to control the level of correlation between propagation channels and maximize the diversity gain, or potential system capacity of a space-time system. Both the design of the antenna arrays and characteristics of the propagation environment influence a system's potential capacity. This thesis describes the construction of a measurement system and the use of this system to evaluate the capacity gains of multi-element arrays in a wireless communication system. The presented system is capable of measuring the channel gains between a number of transmitter and receiver antenna elements and calculating both the cross-correlation between channel gains and the theoretical system capacity. After a discussion of previous research, the measurement system and subsequent measurement results are described. / Master of Science
22

Testing of a Magnetically Levitated Rocket Thrust Measurement System Demonstrator for NASA

Blumber, Eric Joseph 01 July 2002 (has links)
Existing thrust measurement systems (TMSs) at NASA Stennis Space Center use strain gauges and flux plates to measure forces produced by a test article. Alignment and calibration can take two weeks or more every time a piece of hardware or test article is changed. Cross axis loading is also problematic because it is impossible to perfectly align the flex plates and strain gauges in the thrust direction. In response to these problems, a magnetically levitated thrust measurement system has been proposed and a 300lb capacity demonstrator has been designed and built. In this design, the magnetic bearings work concurrently as support bearings and force measurement devices. The demonstrator consists of a floating frame that is completely levitated within a fixed frame by four support bearings carrying loads in the x- and y-direction and seven thrust bearings carrying loads in the z- or thrust direction. Joe Imlach of Imlach Consulting Engineering designed the demonstrator and magnetic bearing components, while Virginia Tech's role has been the application of the multipoint calibration technique including code development, the implementation of a 128-channel data acquisition system, and the overall test verification of the TMS demonstrator.A turnbuckle assembly and magnetostrictive actuator are used in series with a conventional load cell for static and dynamic testing, respectively. Both current based and flux based force equations were used to measure the reaction forces at the bearings. The static results using the current based equations including the current based fringing equations resulted in accuracies of 93% of full load, while the static results using the flux based equations including the flux based fringing equations resulted in accuracies of 99.5% of full load. These accuracies can be compared to accuracies of 83-90% seen in previous work using magnetic bearings to measure forces by monitoring currents and to accuracies of about 99% in previous work using magnetic bearings to measure forces by monitoring fluxes. All of the improved accuracies were made possible through the implementation of a calibration technique known as the multipoint method and the implementation of a gap dependent fringing correction factor developed by Joe Imlach. The demonstrator was not outfitted with accelerometers so the inertia of the floating frame could not be accounted for, limiting the scope of dynamic testing. However, the tests confirmed the ability of the demonstrator to measure dynamic loads in general. / Master of Science
23

Estudo sobre as mudanças nos sistemas de medição de desempenho causadas pela implantação de práticas de sustentabilidade / Study on performance measurement systems changes caused by the implementation of sustainability practices

Leite, Luciana Rosa 30 October 2014 (has links)
Made available in DSpace on 2016-06-02T19:50:26Z (GMT). No. of bitstreams: 1 6538.pdf: 3408162 bytes, checksum: 85cea22acdce40da79f51ce8f67bafd7 (MD5) Previous issue date: 2014-10-30 / Financiadora de Estudos e Projetos / The research in performance measurement (PM) systems have reacted to changes in organizations environments. In recent years, in response to the pressures of society, the organizations are increasingly implementing sustainability practices. Following this context, this study aims to investigate empirically the changes in PM systems caused by the implementation of sustainability practices in organizations. The bibliometric studies and systematic literature review have showed that there is no clear relationship between the research on sustainability and PM systems. Hence, it is necessary to develop more empirical studies to close the identified gap. In the first research effort of this thesis, a case study was carried out in a company which is ranked as sustainability company in Brazil index. The empirical findings indicate that the PM system changes have occurred in three elements: performance measures, how the companies communicate their results, and the process of information management. These findings were the foundation for developing the survey, the second research effort. The survey was carried out in a population of 182 companies which publish sustainability reports in Brazil, according to the Global Reporting Initiative standards . After the data collection, 81 valid responses were received. The data analyzes demonstrate that the respondents who perceived change in PM systems work in companies which has more implemented environmental practices. Additionally, this perception is influenced by PM systems variables: use of social indicators, the relevance of social/environmental indicators, the new social/environmental performance indicators, the internal communication among all hierarchical classes of roles, the external communication to several groups of stakeholders, the use of benchmarking, the compliance with regulations issues, the information provided from PM system about social/environmental performance measures and the interpretation of the social/environmental performance indicator results. Therefore, the sustainability practices have acted as triggers for changes in performance measurement systems. / Historicamente, as pesquisas em sistemas de medição de desempenho (SMDs) têm se comportado de forma reativa às mudanças que ocorrem nas organizações. Nos últimos anos, em resposta às pressões da sociedade, as organizações estão introduzindo práticas de sustentabilidade aos seus negócios. Dentro deste contexto, este trabalho tem como objetivo investigar empiricamente as mudanças nos sistemas de medição de desempenho causadas pela implantação de práticas de sustentabilidade nas organizações. Estudos realizados, com uso de análises bibliométricas e revisão sistemática, mostraram que não existe uma forte aderência entre artigos científicos sobre SMDs e sustentabilidade. Ficou clara a necessidade de mais estudos empíricos. A primeira parte empírica desta tese trata-se de um estudo de caso realizado em uma empresa listada em um ranking brasileiro de sustentabilidade. Os resultados apontaram que as mudanças no SMD da empresa ocorreram principalmente em três elementos: nos indicadores de desempenho, na forma como resultados são comunicados, e no processo de gestão da informação. Esses resultados foram a base para o desenvolvimento da survey conduzida na etapa seguinte com uma população de 182 empresas que publicaram relatórios de sustentabilidade no Brasil, de acordo com os padrões estabelecidos pela Global Reporting Initiative. Após a coleta de dados, 81 respostas válidas foram recebidas. As análises dos dados comprovaram que respondentes que tiveram a percepção de mudanças nos SMDs estão em empresas que implantaram mais práticas ambientais. Tal percepção é influenciada pelas variáveis do SMD: monitoramento de indicadores sociais, relevância estratégica de indicadores sociais e/ou ambientais, a definição desses tipos de indicadores ser realizada a partir de objetivos estratégicos, a divulgação interna e externa dos resultados da empresa para diferentes níveis hierárquicos e stakeholders, a utilização de benchmarking para a decisão sobre a implantação de novas práticas sociais e/ou ambientais, o cumprimento de requisitos de divulgação legal, o fornecimento de informações sociais e/ou ambientais precisas e atualizadas e o acompanhamento periódico desses resultados. Portanto, é possível concluir que as práticas de sustentabilidade funcionam como alavancas para a mudança nos sistemas de medição de desempenho.
24

Thermal, electronic and magnetic properties of the strongly correlated CeCu₅-ᵪ Alx ᵪ system

Britz, Douglas 07 June 2012 (has links)
M. Sc. / The substitution series CeCu5−xAlx where x 2 {1.0, 1.5, 2.0, 2.1, 2.2, 2.3, 2.4} was synthesized and characterized via x-ray diffraction and scanning electron microscope analysis. All the compounds formed single phase in the P6/mmm hexagonal crystal structure, which pushed the solubility limit of Al within this structure from CeCu3Al2 to CeCu2.6Al2.4. The ascast samples were annealed, but the annealing process had no visible effect on the crystalline nature nor on the physical properties of the samples. The electric, magnetic and thermal properties were measured on Quantum Design’s Physical Properties Measurement System and Magnetic Properties Measurement System. The electrical resistivity showed single-ion Kondo scattering at intermediate temperatures with no signs of coherence for x 2 {1.0, 1.5, 2.0, 2.1, 2.2, 2.3} CeCu2.6Al2.4 on the other hand showed a weak maximum at 2 K, which was the onset of antiferromagnetic ordering confirmed by other measurements. The magnetoresistance was fitted by the Beth´e ansatz spin-1/2 model and the obtained Kondo temperatures had a maximum at CeCu3Al2, with linear dependencies on Al concentration on either side of this point. The Kondo moments followed an exponential dependence on the Al concentration, but these effective moments were far lower than the free-ion value, due to the Kondo interaction. The thermal conductivity in this series was phonon dominated with the magnitude of the electronic component being inversely proportional to the Kondo temperature, showing the effect that the Kondo scattering mechanism has on the availability of the conduction electrons to participate in heat transport. The magnitude of the peak in the thermoelectric power S(T) was strongly dependent on the Al concentration, having a maximum at CeCu2.8Al2.2. Below the peak there were two temperature dependencies: S(T) / T for x 2 {1.0, 1.5, 2.4} which is metallic and for x 2 {2.0, 2.1, 2.2, 2.3} S(T)/T /−ln(T) which is characteristic of a quantum critical point. The data were also fitted with a phenomenological model and the obtained Kondo temperatures were quantitatively similar to those obtained from the Beth´e ansatz. The heat capacity Cp(T) data confirmed these compounds to be heavy fermions and also showed Cp(T)/T /−ln(T) below 10 K, which is the hallmark for a magnetically tuned quantum critical point. The magnetic susceptibility showed a Curie-Weiss temperature dependence at temperatures above 100 K, with magnetic moments close to the free-ion value, indicating the presence of localized magnetic moments. The low temperature data found (T) /−ln(T) for Al concentrations near CeCu3Al2 and the ordering present in CeCu2.6Al2.4 was suppressed by 0.3 K in going from 0.01 T to 2 T, suggesting that the ground state is antiferromagnetic in this compound.
25

Identificação de requisitos básicos de sistemas de medição de desempenho e avaliações de casos de um sistema computacional de suporte / Performance measurement systems basic requirements identification and cases assessment of a computer-based support system

Esposto, Kleber Francisco 30 October 2003 (has links)
Apresenta um levantamento abrangente de novas considerações sobre Sistemas de Medição de Desempenho (SMD) e o novo panorama ambiental que envolve as empresas e impacta suas formas de avaliação de desempenho. Compila, a partir desses estudos, os principais requisitos de SMDs em uma tabela e propõe um modelo conceitual para sistema de medição de desempenho. Identifica, também, um sistema computacional para suportar o processo de gestão estratégica de desempenho em empresas. Analisa a satisfação desse sistema computacional estudado em relação aos principais requisitos levantados e compilados. As análises em relação a essa satisfação são feitas segundo a percepção do autor desse trabalho, treinado nesta ferramenta, e de profissionais de empresas que utilizam o sistema avaliado. A percepção desses profissionais é obtida por meio da realização de entrevistas em uma pesquisa de campo, guiadas por um questionário. / It presents a wide literature survey on rising considerations about Performance Measurement Systems (PMS) and the modern environmental which surrounds the companies and impacts their performance evaluation system. It compiles from this survey the main PMS requirements in a table and it suggests a conceptual model for performance measurement system. It identifies, too, a commercial computer-based system in order to support strategic performance measurement management. It also analyzes how the PMS requirements are satisfied by the computer-based system, based on the author perception, who was trained at this tool, and on the perception of customers of this system. The assessment of these customer\'s perceptions were made in site through questionnaire based interviews.
26

Experiências sobre a implementação de Balanced Scorecard em empresas no Brasil: estudos de caso.

Canevarolo, Maria Estela Antonioli Pisani 20 August 2004 (has links)
Made available in DSpace on 2016-06-02T19:52:01Z (GMT). No. of bitstreams: 1 DissMEAPC.pdf: 3917683 bytes, checksum: a6136d785a65f3e03064fb1b797087c8 (MD5) Previous issue date: 2004-08-20 / This dissertation aims to investigate the implementation of Balanced Scorecard (BSC) in two large companies that operates in Brazil. The realization of the inadequacy of traditional performance measurement systems based on Managerial Accounting that occurred from the beginning of the twenty-century due to the new external and internal operational conditions faced by the most of the companies, many performance measurement systems have been proposed. The most visible result of such revolution is the BSC applied worldwide as well as in Brazil. The BSC has evolved from a performance measurement system to a strategic management system. With relation to Brazil, it is known the growing number of companies adopting the BSC but little empirical research can be found on implementation. The adopted research method was the case study in order to capture the different perspectives on implementation, by conducting semi-structured interviews with people involved in it. Furthermore, the investigation allowed observation of concrete aspects of the implementation. The empirical findings show the implementation of third generation BSC, that is, BSC applied as strategic management system in both companies. With the BSC implementation the culture of strategic planning was implemented or strengthened in the studied companies. The information technology has played a very important role to communicate the strategy but alone it was not enough being also necessary, among other aspects, a good communication plan and the top management support. Also, it was observed that the stakeholder vision regarding performance measurement was limited. Although the BSC is a simple concept it was hard to be implemented because it required the involvement of many people who did not have the same understanding of strategy. / O objetivo desta dissertação é estudar as experiências de implementação do BSC envolvendo duas empresas de grande porte no Brasil. Após o entendimento da inadequação dos sistemas de medição de desempenho tradicionais, oriundos da Contabilidade Gerencial do início do século XX, frente às novas condições operacionais tanto internas quanto externas da maioria das empresas, novos sistemas de medição de desempenho foram propostos. Dentre eles, aquele que mais se destaca na aplicação nas empresas, ao redor do mundo quanto no Brasil, é o Balanced Scorecard (BSC). O BSC evoluiu de um sistema de medição de desempenho para um sistema de gestão estratégica. Especificamente no caso brasileiro, observa-se que é crescente o número de empresas que estão adotando o método, mas poucos relatos existem sobre a implementação. Para o desenvolvimento desta pesquisa, o procedimento de pesquisa adotado é o estudo de casos que permitiu captar diferentes aspectos da implementação do BSC por meio de entrevistas semi-estruturadas com pessoas envolvidas na implementação. Além disso, a investigação de campo permitiu observar aspectos concretos da implementação. Os resultados apontam que as duas organizações estudadas implementaram um BSC é de 3ª geração, sendo o mesmo utilizado como um sistema de gestão da estratégia. Com a adoção do BSC ocorreu uma consolidação e/ou introdução da cultura de planejamento estratégico nas organizações estudadas. O uso da tecnologia da informação foi muito importante para a implementação do BSC, porém sozinha ela não foi suficiente, sendo necessário entre outros aspectos, um bom plano de comunicação e o apoio da alta administração. Observou-se ainda que a visão do stakeholder ficou limitada na medição de desempenho e que o método não é simples de ser implementado, pois envolve muitas pessoas e a estratégia muitas vezes não é bem compreendida por todos os envolvidos na implementação do BSC.
27

Identificação de requisitos básicos de sistemas de medição de desempenho e avaliações de casos de um sistema computacional de suporte / Performance measurement systems basic requirements identification and cases assessment of a computer-based support system

Kleber Francisco Esposto 30 October 2003 (has links)
Apresenta um levantamento abrangente de novas considerações sobre Sistemas de Medição de Desempenho (SMD) e o novo panorama ambiental que envolve as empresas e impacta suas formas de avaliação de desempenho. Compila, a partir desses estudos, os principais requisitos de SMDs em uma tabela e propõe um modelo conceitual para sistema de medição de desempenho. Identifica, também, um sistema computacional para suportar o processo de gestão estratégica de desempenho em empresas. Analisa a satisfação desse sistema computacional estudado em relação aos principais requisitos levantados e compilados. As análises em relação a essa satisfação são feitas segundo a percepção do autor desse trabalho, treinado nesta ferramenta, e de profissionais de empresas que utilizam o sistema avaliado. A percepção desses profissionais é obtida por meio da realização de entrevistas em uma pesquisa de campo, guiadas por um questionário. / It presents a wide literature survey on rising considerations about Performance Measurement Systems (PMS) and the modern environmental which surrounds the companies and impacts their performance evaluation system. It compiles from this survey the main PMS requirements in a table and it suggests a conceptual model for performance measurement system. It identifies, too, a commercial computer-based system in order to support strategic performance measurement management. It also analyzes how the PMS requirements are satisfied by the computer-based system, based on the author perception, who was trained at this tool, and on the perception of customers of this system. The assessment of these customer\'s perceptions were made in site through questionnaire based interviews.
28

Measurement and Analysis of Radio Wave Coverage in Industrial Environments

Ängskog, Per January 2012 (has links)
Several studies have characterized the path loss properties in industrial environments. However most of them have focused on one frequency, and some two or maximum three frequencies, usually cellular telephone frequencies or the unlicensed ISM bands that are commonly used in various industries. Few, if any, have characterized a larger part of the useable frequency range.This thesis is taking that challenge and investigates the path loss characteristics over a large frequency range, 300 MHz – 3 GHz, in industrial environments. First a measurement system suitable for the harsh environments found in industries is designed and verified. The measurement system is designed as two asynchronous stand-alone units that can be positioned at an arbitrary position to measure the path loss characteristics in any environment without interfering with the normal activities at the location. After that a measurement campaign involving three different types of environments is carried out. The environment types are: first, one highly absorbing – a paper warehouse at a paper mill; second, one highly reflective – a furnace building filled with metal objects and constructions and third, a mine tunnel – located 1 km below the surface of earth which is neither highly reflective nor absorbing but exhibits somewhat wave-guide like characteristics. The environments are shown to have very different behavior when it comes to propagation characteristics. Observations in the first environment reveal an environment that almost cancels out certain frequency bands and only line-of-sight communication is possible, hence no improvement will be achieved if installing systems that take multipath propagation into account, like MIMO. In the second environment reflections are legion; there are so many reflecting surfaces at different angles so any polarization of the signal is almost completely eliminated. Large fading variations were observed.The third environment is the underground mine where signals propagate inside the tunnels like in waveguides. It is shown that there are regions in the spectrum where the path loss dips and that these dips at least partly can be modeled with a simple two-beam propagation model normally used for outdoor propagation over infinite fields. The overall conclusion is that industrial environments are more heterogeneous regarding propagation characteristics than commonly assumed when selecting communication solutions. And that the only way to really know if a radio system will work at a certain location is to measure and characterize the environment.
29

A non-intrusive video tracking method to measure movement of a moored vessel

Kieviet, Johan 03 1900 (has links)
Thesis (MSc)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: There are several ports around the world currently experiencing problems with moored vessel motions. Extreme vessel motions are mainly caused by long waves, which can become trapped inside a harbour basin. The extreme motions can cause downtime in port operations and in some instances cause mooring lines to break. Methods and procedures currently available to measure motions of moored vessels require vessel specific information as input. The implementation of these methods is seen as impractical to implement on every vessel visiting the port and require the physical measurement of some points on the vessel and/or the placement of some kind of measurement device on the vessel. A new Six Degree of Freedom (6DOF) motion measurement system for a moored vessel is presented in this document. The system analyses a video image sequence from one camera. The method estimates the 3D rigid motion for an object of known size by using a Pose from Orthography and Scaling with ITerations (POSIT) algorithm. The object for which the motion is estimated is located on the deck of the vessel and within the camera field of view. Geometric rigid body calculations allow for the calculation of camera perspective rotations and translation of an object on the vessel. Further geometric calculations allow for converting camera perspective motions to the 6DOF object motions. The primary objective of this study was to validate and verify the motions obtained from two proof-of-concept tracking systems. For evaluation purposes, the validation was done by using a small scale physical model set-up in a hydraulics laboratory and using a known method as reference. The Keoship system from the Council for Scientific and Industrial Research (CSIR) is currently one of the most accurate small scale vessel motion measurement systems and was used as reference. The first method tested was the tracking of a 2D LED rectangle mounted on the vessel. This method tracked a 2D object and was primarily used as a stepping stone to measure movement of a 3D object. The second method tracked a 3D object on the vessel. Each tracking method was tested for four different wave conditions with each condition additionally repeated twice as repeatability tests, resulting in a total of 12 tests for each tracking method. When comparing the 2D LED tracking and 3D Object tracking data to data measured with the Keoship system, results show that in general, the 3D Object tracking data compared better to the Keoship data. Tests under controlled conditions enabled a direct estimation of the absolute accuracy of the two developed methods. The verification and accuracy test results, indicated that the 2D LED tracking system should not be pursued further. The results also indicated that for prototype motions exceeding 0.6 m (i.e. storm events) the 3D Object tracking system would have an accuracy close to the maximum allowable accuracy criterion of 0.1 m. This makes the system viable at its current proof-of-concept stage for further development which would enable rapid deployment during a storm event in a prototype situation. / AFRIKAANSE OPSOMMING: Daar is verskeie hawens regoor die wêreld wat tans bewegings probleme op gemeerde skepe ervaar. Hierdie buitensporige bewegings word veroorsaak deur lang periode golwe wat binne die hawe bekkens vasgekeer word. Dit kan daartoe lei dat hawe bedrywighede tot stilstand kom en in ernstige gevalle ook veroorsaak dat meringslyne breek. Huidige metodes vir die meet van skeepsbewegings op vasgemeerde skepe, vereis skeep spesifieke inligting as inset. Die toepassing van hierdie metodes op elke skip wat die hawe besoek, word as onprakties beskou, aangesien dit die fisiese meting van sekere punte op die skip behels. In sekere gevalle is dit selfs nodig om meet toestelle op die skip te plaas. In hierdie dokument word ‘n nuwe metode aangebied om die ses grade van vryheid bewegings vir ‘n vasgemeerde skip te meet. Hierdie stelsel analiseer ‘n video beeld reeks van een kamera. Die metode bereken die 3D rigiede beweging van ‘n voorwerp, waarvan die grootte bekend is. ’n ‘Pose from Orthography and scaling with Iterations’ (POSIT) algoritme word hiervoor gebruik. Die voorwerp waarvoor beweging gemeet word is op die dek van die skip en in kamera sig. Rigiede geometriese voorwerp berekeninge word gebruik om die rotasie en translasie vanuit ‘n kamera perspektief te bereken. Verdere geometriese berekeninge maak dit moontlik om die bewegings vanuit die kamera perspektief te omskep in die ses grade van vryheid bewegings van die voorwerp. Die hoof doelwit van hierdie ondersoek was om die gemete bewegings van twee beweging stelsels te valideer en te verifieer. Die validasie en verifiëring was in ‘n hidrolise laboratorium met ‘n klein skaal model opstelling getoets. ‘n Meet metode van skeepsbeweging op klein skaal wat reeds bekend is, is gebruik as ‘n verwysingsraamwerk waarteen die metings vergelyk kan word. Die Keoship stelsel van die Wetenskaplike Nywerheids Navorsings Raad (WNNR) is tans een van die mees akkurate klein skaal skeepsbeweging meet stelsels, en was as verwysing gebruik. Die eerste bewegings metode is getoets op ‘n 2D reghoek vervaaridig uit ligstralede diodes. Hierdie metode het die 2D voorwerp gevolg en is hoofsaaklik gebruik as ‘n boublok om die beweging van ‘n 3D voorwerp te volg. Die tweede metode het die beweging van ‘n 3D voorwerp op ‘n skip gevolg. Vir elke meet metode was daar vier verskillende golf toestande. Elke golf toestand was ook ‘n verdere twee keer herhaal vir herhaalbaarheids doeleindes. Saam met die herhaalbaarheids toetse was daar in totaal, 12 toetse vir elkeen van die twee metodes gedoen. Met die Keoship metode as verwysing, bewys hierdie toetse dat die 3D metode beter resultate lewer as die 2D metode. Toetse onder beheerde toestande, het dit moontlik gemaak om die absolute akkuraatheid van albei sisteme wat ontwikkel was, te evalueer. Verifikasie en akuraatheids toetse het aangedui dat verdere ontwikkeling van die 2D metode gestuit moet word. Die resultate het ook aangedui dat die 3D metode ‘n akuraatheid baie na aan die maatstaf van 0.1 m sal hê wanneer prototipe bewegings 0.6 m oorskrei (b.v. gedurende ‘n storm). Dit sal die oplossing lewensvatbaar maak by die huidige bewys van konsep fase vir die verdere ontwikkeling wat vinnige ontplooiing gedurende ‘n storm sal moontlik maak.
30

Kompleksinio organizacijos veiklos vertinimo sistemos formavimas / Formation of the multidimensional performance measurement system

Sližytė, Asta 23 June 2009 (has links)
Didėjantis mokslininkų ir praktikų dėmesys organizacijos veiklos vertinimo problematikai skatina nagrinėti organizacijos veiklos vertinimo, kaip vadybos tyrimų objekto, aktualijas. Aktualu tampa nagrinėti, kokia turi būti organizacijos veiklos vertinimo sistema, kuri, organizacijoms vykdant veiklą kintančioje aplinkoje, užtikrintų kompleksinį organizacijos veiklos vertinimą ir panaudotų vertinimo rezultatus organizacijos valdyme. Disertacijoje nagrinėjamos organizacijos veiklos vertinimo sampratos, vertinimo ryšys su organizacijos valdymu, požiūriai į organizacijos veiklos vertinimą, atliekama organizacijos veiklos vertinimo sistemų apžvalga ir palyginamoji analizė, formuluojamos organizacijos veiklos vertinimo sistemų vystymo kryptys, analizuojamos organizacijos veiklos vertinimo sistemos pasirinkimo problemos. Atlikus empirinį tyrimą, kuriuo siekiama nustatyti kompleksinio organizacijos veiklos vertinimo poreikį Lietuvos verslo organizacijose, pateikiami rezultatai. Atsižvelgiant į kompleksinio organizacijos veiklos vertinimo sistemos formavimo teorinį ir praktinį poreikį, kuriama kompleksinio organizacijos veiklos vertinimo sistema, apibrėžianti sistemos funkcijas, vertinimo elementus ir procesus. Kompleksinio organizacijos veiklos vertinimo sistemos praktinio įgyvendinimo tikslais nustatomi kompleksinio organizacijos veiklos vertinimo sistemos formavimo etapai ir kuriamos konkrečios priemonės kiekvieno etapo įgyvendinimui. Siekiant patvirtinti pateiktų pasiūlymų tinkamumą... [toliau žr. visą tekstą] / The growing attention of scientists and practitioners towards the issues of performance measurement encourage to analyze actualities of performance measurement as individual object of management. It becomes relevant to analyze what performance measurement system must be in order to ensure for the organizations operating in the changing environment the multidimensional performance measurement and usage of measurement results for the management of organization. In dissertation concepts of performance measurement, its relation to management, different approaches towards performance measurement are analyzed, review and comparative analysis of different performance measurement systems is done, directions of development of performance measurement systems are formulated, problems involved in selection among different performance measurement systems are analyzed. Findings of the empirical research assessing the need for multidimensional performance measurement in Lithuanian business organizations are presented. Depending on the need for formation of the multidimensional performance measurement system at both theoretical and practical level, the multidimensional performance measurement system is being designed defining its functions, measurement elements and processes. With the purpose of practical implementation of the multidimensional performance measurement system, stages of formation of the multidimensional performance measurement system and particular means for its implementation... [to full text]

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